Synthesis and Characterization of Organosoluble Poly(imide-ether)s with Bulky 2,3-Diaryl Imidazole Moiety: Study Physical, Thermal and Optical Properties

Two new symmetrical diamines were designed and synthesized having different functional groups such as a pair of phenyl ether linkages, 2,3-diaryl substituted imidazole rings and CF3 groups as pendant, and characterized by FT-IR, 1H and 13C-NMR spectroscopy and elemental analysis. A series of new fluorescent poly(imide-ether)s (PIEs) was prepared by polymerization of the diamines with commercial tetracarboxylic dianhydrides such as pyromellitic dianhydride and 3,3,4,4-benzophenone tetracarboxylic dianhydride. The resulting PIEs were amorphous and had intrinsic viscosity [] in the range of 0.420.51 dL/g. The weight average molecular weights (Mw) of these polymers were measured by GPC and were in the range of 2865835595g/mol with molecular weight distribution (MWD) of 2.122.27. These polymers were readily soluble in a variety of organic solvents and formed low-colored and flexible thin films with cut-off wavelength (0) in the range of 385420nm, and all PIEs films exhibited high optical transparency. They also possessed good thermal stability with 10% weight loss temperatures (T10%) in the range 486537 degrees C in N2. The glass transition temperatures (Tg) of PIEs are in the range 251324 degrees C. These polymers showed fluorescence emission in film and in solution at 459476nm with the quantum yields in the range 412%.